JK is one of the worldwide leaders for blood collection equipment industry. JK is also the only professional manufacturer for inert gas protected vacuum blood collection tubes in the world. Different from general vacuum blood collecting tube, JK vacuum quantitative blood collecting device is added inert gases to protect. The inert gases reduce oxygen content in test-tube and bacterium is not easy to grow. And inert gases are filled of the upper remained space of test-tube, which can effectively slow down the disappearance of C02; maintain the constant value of PH of collected blood; prevent blood plantlets from activation (Because the activation of blood plantlets will cause the collection of blood plantlets and then effect the quantity of blood plantlets. It will also start blood coagulation system and effect PT, APTT, TT, Fib and the determination of coagulation factors.) Subsequently, it will increase the specimen quality of blood and storage period, prolong terms of quality assurance of test-tube and increase the accuracy of examination result! In the blood routine examination, sedimentation test, hemorheology, PT, APTT, TT, Fib and coagulation factors determination, blood platelet collecting examination, enzymology examination, etc., the product has lots of advantages.